If ur baby tooth is moving ,get it removed first. Since u have permanent down ,depending on its location n visibility u can opt for braces treatment ( it takes bit long duration for the treatment ). If not at all interested in braces ,n there's space for the tooth or its affecting ur looks ,eating  u can either opt for implant or bridge as per ur choice. ( short duration treatment) Tc  stay aware stay healthy . .

If baby tooth is obstructing the eruption of permanent tooth, it should be removed . Depends on age of the kid and X ray.

Pls put picture of tooth and also Xray of the same tooth.

Depending on the position of permanent tooth We can decide whether it can be brought in the correct position with the help of orthodontics